Elementary treatise on physics experimental and applied for the use of colleges and schools (1890)
Ganot, A. (Adolphe), 1804-1887, Atkinson, E. (Edmund) · New York : W. Wood · leaf 1045
himself in a prominent position ; it is then quite sufficient to raise theelectroscope even a foot or so to obtain signs of electricity. To observe the electricity of clouds, where the potential is very con-siderable, use is made of a long bar terminating in a point. This bar,which is insulated… … Fig. 976. bar can then give dangerous shocks, a metal ball must be placed near it,which is well connected with the ground, and which is nearer the bar thanthe observer himself; so that if a discharge should ensue, it will strikethe ball and not the observer. Richmann, of St. Petersburg, was killed…
Physics
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